Frederick miller



t 2 Sheets S het 1. F. MILLER & Gr. GREGORY.

(No Model.)

GAR BRAKE.

Patented Oct. 8, 1889 WITNESSES.

A TTORIIIEYS. v

(No Model.) 2 Sheets-Sheet 2.

MILLER & G. GREGORY.

UAR BRAKE.

110.412.5201 PatentedOot.8,1889.

WITNESSES: INl/EIVTOP:

A Tron/ms.

UNITED STATES PATENT OFFICE.

I FREDERICK MILLER, OF J OHNSTOWN, AND GEORGE GREGORY, OF BRAD- DOOK,PENNSYLVANIA; SAID MILLER ASSIGNOR TO SAID GREGORY.

CAR-BRAKE.

SPECIFICATION forming part Of Letters Patent NO. 412,520, dated OctoberS, 1889.

Application filed May 14, 1889. Serial No. 310,699. (No model.)

To all whom it may concern:

Be it known that We, FREDERICK MILLER, of J ohnstown, in the county ofOambria, and GEORGE GREGORY, of Braddock, in the county of Allegheny,and State of Pennsylvania, have invented a new and Improved Oar-Brake,of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved car-brakewhich is simple and durable in construction and very effective andself-acting in operation.

The inventionconsists of a weighted lever supported by means under thecontrol of the operator and of a chain connected with the said lever andwith the brake mechanism proper.

The invention also consists in certain parts and details andcombinations of the same, as Will be fully described hereinafter, andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of the improvement as applied. Fig.2 is alike View of the same in a difierent position, with parts in section;and Fig. 3 is an enlarged plan view of the improvement.

On the under side of a car A is held a cylinder B, connected by a branchpipe 0 with a pipe 0, through which is passed air, water, or any otherfluid under pressure and under the control of the engineer. In thecylinder B operates a piston connected with a pistonrod D, extendingthrough one end of the cylinder B opposite the inlet of the branch pipe0'. When the operator permits the fluid under pressure to pass into thecylinder B, the piston is moved outward, moving thepistonrod D in thesame direction.

On the piston-rod D is pivoted a lever E, pivotally connected at itslower end with a link E, fulcrumed on one end of the cylinder B. Fromthe other end of the lever E extends longitudinally the rod F, connectedwith the chain 'F, wound on a drumsecured on the brake-staff F From thisend of the lever E also extends in the opposite direction from the rod Fa rod G, connected with one end of the chain H, passing over an idler H,mounted to turn on the under side of the car A. The end of the chain His secured to a Weight I, pivoted at I on a rod J, extending through alarge recess I in the said weight I,

so as to permit the weight to swing on the lever J. The latter isfulcrumed at J to one end of the cylinder B, and is pivotally connectedby a forked link K with a chain L, passing over a pulley N and securedto the same. The pulley N is fastened on a shaft 0, mounted to turn insuitable hangers secured to the under side of the car A. On the shaft Ois also secured a pulley P, somewhat less in diameter than the pulley N.011 this pulley P is secured one end of a chain Q, adapted to wind onthis pulley and also passing over a pulley R, from which the chainextends upward and is secured to the under side of the car A. The pulleyR is mounted to turn on the end of a link S, connected with one end ofthe brake-levers of the brake mechanism T, of any approved construction.On the end of the oylinderD areheld two segmental ratchets U, the centerof which is in the pivot J, forming the fulcrum for the lever J. Theteeth of the ratchets U are adapted to be engaged by a pawl U, held ontop of the lever J and pivotally connected with a lever U fulcrumed inits middle on the lever J. The other end of the lever U is pivotallyconnected with a link V, pivotally connected with the lower half of theweight I, held on the lever J. (See Fig. 2.) The pulleys N and P arepreferably located alongside each other on the shaft 0, so as to form adouble pulley.

The operation is as follows: When the carbrake is in the position shownin Fig. l, the operator has permitted the fluid under pressure in thepipe 0 to pass from the latter by the branch pipe 0 into the cylinder B.The piston, as well as its rod 1), is thus moved outward, whereby theWeight I is drawn into an uppermost position by the lever E, the rod D,and the chain H. The lever J is thus also drawn into an uppermostposition, as shown in said Fig. 1. The same movement of the lever J andits weight I can also be accomplished by the operator turning thebrakestait F connected by the brake-chain Fwith the rod F and with thelever E aforesaid. IVhen the lever J is in its uppermost position, thebrake mechanism T is held in like position by the chain Q, connectedwith the pulley P. \Vhen the operator desires to apply the brake, heeither allows the fluid under pressure to escape from cylinder B orturns the brake-staff F so that the lever E is free to swing to thecylinder B to return the piston in the said cylinder to its originalnormal position. This motion of the leverE permits the weight I to swingdownward, so that the leverJ swings in the same direction, and, by thelink K and the chain L, turns the pulley N, secured on the shaft 0, inthe direction of the arrow a. The turning of the shaft 0 causes thelever P to turn in the same direction, so that the chain Q is wound up011 the said pulley, and the link S, carrymg the pulley R, over whichpasses said chain Q, moves in the direction of the arrow 1), whereby thebrake mechanism T is actuated and the brakes are operated in the usualmanner. The caris thus braked. The downward-swinging mot-ion of theweight I and the lever J also causes a swinging of the weightJ itself onthe said lever J. This movement of the weight I into the position shownin Fig. 2 causes a pull on the link V, whereby the lever U is turned andthe pawl U is moved toward the cylinder B to engage a tooth of theratchets U. The lever J is thus locked in position and the brak es areheld on by the force of the weight I, as previously described. Thebrakes are held on until the operator either turns the brake-staff F soas to wind up the chain F, or lets fluid under pressure into thecylinder B. Either of the two operations causes the lever E to swing sothat the weight I swings on the leverJ into its former position, so asto withdraw the pawl U from the ratchets U. A further movement of thelever E by either of the above operations causes an upward swlngin g oftheweightIand tl1elever.I,whereby the shaft 0 is free to revolve to itsformer position to release the brakes. Thus it will be seen that theweightl holds the brakes on until the weight is moved to its formerposition and held there either by the fluid under pressure or by meansof the brake-stalf, as previously described. It will furtherbe seen thatafter the weight I has swung downward it locks the lever J in place, soas to hold the brakes on as long as desired.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. In a car -brake, the combination of a pivoted lever connected to oneof the brakelevers, a weight pivoted on the said pivoted lever, andmeans, actuated by the said weight, for locking the lever in position,substantially as and for the purpose set forth.

2. In a car-brake, the combination, with a lever and a weight held onthe free end of the said lever, of a chain connected with the said.

weight and under the control of the operator to support the weight whenthe brakes are off, a second chain connected at one end with the saidlever, a double pulley on the periphery of which the other end of thesaid second chain is secured, and a third chain held on the said doublepulley and connected with the brake-lever, substantially as shown anddescribed.

3. In a car-brake, the combination, with the ordinary brake mechanism,of a chain connected with one of.the brake-levers of the said brakemechanism, a double pulley on which winds the said chain, a second chainheld on the said double pulley, and a weighted lever connected with thesaid second chain, substantially as shown and described.

4. In a car-brake, the combination, with the ordinary brake mechanism,of a chain connected with one of the brake-levers of the said brakemechanism, a double pulley on which winds the said chain, a second chainheld on the said double pulley, a weighted lever connected with the saidsecond chain, and a locking device to hold the said lever in place whenthe brakes are on, substantially as shown and described.

5. In a car-brake, the combination, with a lever and a weight pivoted onthe outer end of the said lever, of a fixed segmental ratchet held onthe pivot of said lever and a pawl adapted to engage the said fixedsegmental ratchet and actuated by the said weight, substantially asshown and described.

(i. In a car-brake, the combination, with a lever and a weight pivotedon the outer end of the said lever, of fixed segmental ratchets held onthe pivot of said lever, a pawl adapted to engage the said fixedsegmental ratchets and actuated by. the said weight, a second leverpivoted on the said first-named lever and connected with the said pawl,and a link pivotally connecting the weight with the said lever,substantially as shown and described.

FREDERICK MILLER. GEORGE GREGORY.

Witnesses:

ED. E. HOHMANN, WM. PIPER.

